--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotUnwindOp.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.graalvm.compiler.hotspot.amd64;
+
+import static org.graalvm.compiler.hotspot.HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER;
+import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
+import static jdk.vm.ci.amd64.AMD64.rsp;
+import static jdk.vm.ci.code.ValueUtil.asRegister;
+
+import org.graalvm.compiler.asm.amd64.AMD64Address;
+import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
+import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
+import org.graalvm.compiler.hotspot.stubs.UnwindExceptionToCallerStub;
+import org.graalvm.compiler.lir.LIRInstructionClass;
+import org.graalvm.compiler.lir.Opcode;
+import org.graalvm.compiler.lir.amd64.AMD64Call;
+import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
+
+import jdk.vm.ci.code.CallingConvention;
+import jdk.vm.ci.code.Register;
+import jdk.vm.ci.code.RegisterValue;
+
+/**
+ * Removes the current frame and jumps to the {@link UnwindExceptionToCallerStub}.
+ */
+@Opcode("UNWIND")
+final class AMD64HotSpotUnwindOp extends AMD64HotSpotEpilogueBlockEndOp {
+    public static final LIRInstructionClass<AMD64HotSpotUnwindOp> TYPE = LIRInstructionClass.create(AMD64HotSpotUnwindOp.class);
+
+    @Use({REG}) protected RegisterValue exception;
+
+    AMD64HotSpotUnwindOp(RegisterValue exception) {
+        super(TYPE);
+        this.exception = exception;
+    }
+
+    @Override
+    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
+        leaveFrameAndRestoreRbp(crb, masm);
+
+        ForeignCallLinkage linkage = crb.foreignCalls.lookupForeignCall(UNWIND_EXCEPTION_TO_CALLER);
+        CallingConvention cc = linkage.getOutgoingCallingConvention();
+        assert cc.getArgumentCount() == 2;
+        assert exception.equals(cc.getArgument(0));
+
+        // Get return address (is on top of stack after leave).
+        Register returnAddress = asRegister(cc.getArgument(1));
+        masm.movq(returnAddress, new AMD64Address(rsp, 0));
+
+        AMD64Call.directJmp(crb, masm, linkage);
+    }
+}